/*
 * Copyright 2009-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.security.kerberos.authentication.sun;

import javax.security.auth.Subject;
import java.security.Principal;
import java.util.HashSet;

/**
 * JAAS utility functions.
 * @author Bogdan Mustiata
 */
public class JaasUtil {
    /**
     * Copy the principal and the credentials into a new Subject.
     * @param subject
     * @return
     */
    public static Subject copySubject(Subject subject) {
        Subject subjectCopy = new Subject(false,
                new HashSet<Principal>(subject.getPrincipals()),
                new HashSet<Object>(subject.getPublicCredentials()),
                new HashSet<Object>(subject.getPrivateCredentials()));

        return subjectCopy;
    }
}
